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SetScrollView


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Hi,

I am having difficulty with your setscrollview function. I create a chart

with data inserted wth the API, then I set the scroll view

(chartfx.axis(axis_x).setscrollview chartfx.nvalues - 20, chartfx.nvalue).

The problem occurs when I attempt to update a value of one of the last point

(lngcount) in the chart :

ChartFX.OpenDataEx COD_VALUES, COD_UNCHANGE, COD_UNCHANGE

ChartFX.OpenDataEx COD_XVALUES, COD_UNCHANGE, COD_UNCHANGE

'

'|| Pass the data in the order expected by Chart FX FE

'

ChartFX.ValueEx(0, lngCount) = dblLow 'low

'ChartFX.ValueEx(1, lngCount) = dblOpen 'open

ChartFX.ValueEx(2, lngCount) = dblTickBid 'close

ChartFX.ValueEx(3, lngCount) = dblHigh 'high

'

'|| Dates are passed in julian form using CDate Function

ChartFX.XValueEx(0, lngCount) = CDate(dtDate)

'

'|| Close the Communication Channels

ChartFX.CloseData COD_VALUES Or COD_SMOOTH

ChartFX.CloseData COD_XVALUES Or COD_SMOOTH

Aftter this is called, the scrollview is destroyed and I am back to looking

at hundreds of candlesticks.

Is there a way to update data without being thrown out of the scrollview? Or

maybe there is another way to do this without using setscrollview?

Thanking you in advance,

Chase Gale

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No. ScrollView will be reset when new data is assigned as scaling may change

completely and current scroll setting may make no sense.

If your particular case ensures that the data range remains constant and

therefore the current scroll view can be re-applied to the new data, you can

simply call GetScrollView prior to OpenDataEx to retrieve the current

values, then call SetScrollView after CloseData to re-apply these.

--

FP

Software FX, Inc.

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Yes,

But then you have an odd effect - it zooms out and then a second later back

in. Is there a way to prevent that from happening?

Thanks,

Chase Gale

"SoftwareFX Support" <support@softwarefx.com> wrote in message

news:YzPVuSP5CHA.3148@webserver1.softwarefx.com...

> No. ScrollView will be reset when new data is assigned as scaling may

change

> completely and current scroll setting may make no sense.

>

> If your particular case ensures that the data range remains constant and

> therefore the current scroll view can be re-applied to the new data, you

can

> simply call GetScrollView prior to OpenDataEx to retrieve the current

> values, then call SetScrollView after CloseData to re-apply these.

>

> --

> FP

> Software FX, Inc.

>

>

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